Hi, welcome to PT! Just a few questions first.... are they spayed and neutered? Is there any possible way to keep them in separate crates? Females tend to be more dominant, and if one/both aren't spayed or neutered that will only add to the dominance factor. But an easy fix would simply be to keep them crated separately to avoid the aggression she is displaying toward your male. Spaying and neutering will help, too.